A few specs for the device:
- 2.5 amps per phase
- 24V operation
- no load speed in excess of 2,500 RPM
- microstepping modes
- low total parts count per driver
- reliable optical isolation
Step 1: Schematic
This is the schematic for my drive. A full sized file can be found at:
Step 2: Board
This is the board layout I came up with. I wasn't planning on etching it, I only needed parts on a board. I print this out, tape it to a piece of board, drill it, put parts in, then solder them point to point. When I design stuff I keep in mind that I have to make it too so I try to design things I am capable of making. Making this is a little tricky but it can be done. It works too, and I know no one is going to rip my design off for commercial exploitation. Good luck making these in quantity! I made three and that was enough for me for a while.
Link to full sized file:
Pop Quiz: Can anyone see what label is wrong with this? Compare to this:
At least I think that one is right now.